A quasi-linear irreducibility test in K[[x]][y]

We provide an irreducibility test in the ring K [ [ x ] ] [ y ] whose complexity is quasi-linear with respect to the discriminant valuation, assuming the input polynomial F is square-free and K is a perfect field of characteristic not dividing deg ( F ) . The algorithm uses the theory of approximate...

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Bibliographic Details
Published in:Computational complexity Vol. 31; no. 1
Main Authors: Poteaux, Adrien, Weimann, Martin
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01.06.2022
Springer Nature B.V
Springer Verlag
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ISSN:1016-3328, 1420-8954
Online Access:Get full text
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Summary:We provide an irreducibility test in the ring K [ [ x ] ] [ y ] whose complexity is quasi-linear with respect to the discriminant valuation, assuming the input polynomial F is square-free and K is a perfect field of characteristic not dividing deg ( F ) . The algorithm uses the theory of approximate roots and may be seen as a generalisation of Abhyankar's irreducibility criterion to the case of non-algebraically closed residue fields.
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content type line 14
ISSN:1016-3328
1420-8954
DOI:10.1007/s00037-022-00221-w